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Windows 7: Master harddrive not showing up in my computer

I installed the windows 7 and my secondary internal harddrive. The first hard drive has windows xp sp3 on it. The harddirve is detected in the device manager but it's not in my computer under hard disk drives. Windows 7 harddrive is on an ide while windows xp is on an sata. Pictures show the problem

I put this post under the drivers section since it might be a driver problem, but I don't really know
(The snipping tool is great)

i had same issue.
problem is, win 7 for some reason haven't assigned a letter for your hard drive.
here's how to add letter manually:
Open start menu, and in search bar type compmgmt.msc and hit enter.
This will open computer management tool.
Then in new window on the left side expand menu Storage, and click on Disk Management.
You should see all your disks in the center part of the screen
Find the 'missing' drive(the one that doesnt have name\letter), right click it and click on "Change Drive Letter and Paths"
Then click on "Add...", tick on "Assign the following Drive Letter", choose the letter you want, press OK, and close the manager.
Now You should be able to find your missing drive in "My Computer"

It is not "for some reason" - this is by design, because sometimes when Vista was installed, as a dual boot and *particularly* if it was started from inside the previous OS, it would *not* restructure the partition naming, and thus you'd get your original OS *still* on C, and Vista on something stupid like E or K, whatever letter was next available.

W7 by default hides access to all other system drives so as to not confuse the end user since this is a Beta OS - last thing you want to do is to try to delete a file in W7 only to delete it out of your normal everyday OS - and all of a sudden have a dead computer.

It is not "for some reason" - this is by design, because sometimes when Vista was installed, as a dual boot and *particularly* if it was started from inside the previous OS, it would *not* restructure the partition naming, and thus you'd get your original OS *still* on C, and Vista on something stupid like E or K, whatever letter was next available.

W7 by default hides access to all other system drives so as to not confuse the end user since this is a Beta OS - last thing you want to do is to try to delete a file in W7 only to delete it out of your normal everyday OS - and all of a sudden have a dead computer.

when i had this problem, the drive that got dissapeared was partition with bunch of files. no OS was previously installed on it, and when i had vista, that partition was mapped as D: (< Not a smiley )

No disrespect, John. I have discussed this on a couple of other forums and have not got a very good answer.
Have you read anything to support your post, on a Microsoft page. I acoont find anything.
I have to doubt it, as, if you install from within your existing OS, it seems to set up the other Partitions/disks without problem.

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